Spring MVC View & Static Resouce & Cache

View Process

ViewResolver and View Interface

• AbstractCacheingViewResolver
• UrlBasedViewResolver
• FreeMarkerViewResolver
• ContentNegotiatingViewResolver
• InternalResourceViewResolver

View Resolve Logic in DispatchServlet

• initStrategies()
• initResolvers() initialize the ViewResolver
• doDispatch()
• processDispatchResult()
• if no view returns, try RequestToViewNameTranslator
• resolveViewName() resolve view object

@ResponseBody

• In HandlerAdapter.handle(), it outputs the response
• RequestMappingHandlerAdapter.invokeHandlerMethod()
  • HandlerMethodReturnValueHandlerComposite.handlerReturnValue()
  • RequestResponseBodyMethodProcessor.handleReturnValue()

Redirect

• rediect:, http client 302
• forward:, server side

Spring MVC Common Views

Supported Views

• https://docs.spring.io/spring/docs/current/spring-framework-reference/web.html#mvc-view
• Jackson-based JSON/XML
• Thymeleaf & Freemarker

Configure MessageConverter

• Through configureMessageConverters() of WebMvcConfigurer
• Spring boot auto find and register HttpMessageConverters
  

Jackson Support in Spring Boot

• JacksonAutoConfiguration
• Spring boot register JSON serialization component through @JsonComponent
• Jackson2ObjectMapperBuilderCustomizer
• JacksonHttpMessageConvertersConfiguration
• Add jackson-dataformat-xml to support XML serialization

Spring Boot Static Resource Configuration and Cache

Resource Configuration

Core

• WebMvcConfigurer.addResourceHandlers()

Common Configurations

• spring.mvc.static-path-pattern = /**
• spring.resources.static-locations = classpath:/META-INF/resources/, classpath:/resources/,classpath:/static/,classpath:/public/

Spring Boot Resouce Cache

Common Configurations

• ResourceProperties.Cache
• spring.resouce.cache.cachecontrol.max-age=time
• spring.resouce.cache.cachecontrol.no-cache=true/false
• spring.resouce.cache.cachecontrol.s-max-age=time

Controller Manually Set (Not Recommend)